fix: remove middleware and route groups to fix Vercel deployment

- Remove middleware.ts entirely (caused __dirname ReferenceError in Edge)
- Auth protection handled by dashboard layout.tsx (server-side redirect)
- Move pages out of (marketing) and (auth) route groups to fix 404 on /
- Keep (protected) route group for dashboard/formations/profil shared layout

https://claude.ai/code/session_01H2aRGDaKgarPvhay2HxN6Y

app/(protected)/formations/page.tsx

@@ -0,0 +1,108 @@
+import { createClient } from "@/lib/supabase/server";
+import ModuleCard from "@/components/dashboard/ModuleCard";
+import ProgressBar from "@/components/dashboard/ProgressBar";
+import type { Module, UserProgress } from "@/types/database.types";
+
+export default async function FormationsPage() {
+  const supabase = await createClient();
+
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+
+  // Récupérer les modules publiés
+  const { data: modules } = await supabase
+    .from("modules")
+    .select("*")
+    .eq("is_published", true)
+    .order("week_number", { ascending: true })
+    .order("order_index", { ascending: true }) as { data: Module[] | null };
+
+  // Récupérer la progression
+  const { data: progress } = await supabase
+    .from("user_progress")
+    .select("*")
+    .eq("user_id", user!.id) as { data: UserProgress[] | null };
+
+  // Grouper les modules par semaine
+  const modulesByWeek = (modules || []).reduce(
+    (acc, module) => {
+      const week = module.week_number;
+      if (!acc[week]) acc[week] = [];
+      acc[week].push(module);
+      return acc;
+    },
+    {} as Record<number, Module[]>
+  );
+
+  const totalModules = modules?.length || 0;
+  const completedModules =
+    progress?.filter((p) => p.completed).length || 0;
+  const progressPercent =
+    totalModules > 0 ? (completedModules / totalModules) * 100 : 0;
+
+  return (
+    <div className="max-w-6xl">
+      {/* Header */}
+      <div className="mb-10">
+        <h1 className="text-3xl font-bold text-white mb-2">Formations</h1>
+        <p className="text-white/60 mb-6">
+          Progression dans le programme HookLab - 8 semaines.
+        </p>
+        <ProgressBar
+          value={progressPercent}
+          label={`${completedModules} modules completes sur ${totalModules}`}
+        />
+      </div>
+
+      {/* Modules par semaine */}
+      {Object.entries(modulesByWeek).map(([week, weekModules]) => {
+        const weekCompleted =
+          weekModules?.filter((m) =>
+            progress?.find((p) => p.module_id === m.id && p.completed)
+          ).length || 0;
+        const weekTotal = weekModules?.length || 0;
+
+        return (
+          <div key={week} className="mb-10">
+            <div className="flex items-center justify-between mb-4">
+              <h2 className="text-xl font-bold text-white">
+                Semaine {week}
+              </h2>
+              <span className="text-white/30 text-sm">
+                {weekCompleted}/{weekTotal} completes
+              </span>
+            </div>
+            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+              {weekModules?.map((module) => {
+                const moduleProgress = progress?.find(
+                  (p) => p.module_id === module.id
+                );
+                return (
+                  <ModuleCard
+                    key={module.id}
+                    module={module}
+                    progress={moduleProgress}
+                  />
+                );
+              })}
+            </div>
+          </div>
+        );
+      })}
+
+      {/* Message si aucun module */}
+      {totalModules === 0 && (
+        <div className="text-center py-20">
+          <div className="text-5xl mb-4">📚</div>
+          <h3 className="text-white font-semibold text-lg mb-2">
+            Aucun module disponible
+          </h3>
+          <p className="text-white/40 text-sm">
+            Les modules de formation seront bientot disponibles.
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}